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I might as well get it out there and say that I'm female, essentially clueless about cars in general, so if someone responds, please keep that in mind.

Okay, so I have a certain problem with my Ford Ka, 2003 model. Any time I don't have my foot pressed down on the clutch, I get this hissing noise that seems to come from the behind the dashboard, although you can easily hear it if stood outside of the vehicle, so perhaps it's under the bonnet itself.

If I have the clutch to the floor, the sound goes away; whether I'm driving it or just have it in one place. I fear that it's the clutch, as the noise goes away when it's engaged, so to speak.

I took my car to a local mechanic, explaining the problem, but he couldn't find anything wrong with the car... however, when I took it to him, the problem was only slight - if I used the car, then left it for a few hours, and restarted it, the noise wouldn't be there. I think he may not have given the clutch a thought, as he suggested that it could be the gears behind the dashboard that must turn to keep a check on how many miles I'm doing (does that even happen?). The problem has got worse since then, and happens whenever I turn the engine on.

My Ford KA is an old model, and does not give a reading behind the wheel of how many RPM (if that is the right word) there is.

I have an MOT check on the 6th of this month, and plan to bring it up with him then. However, if anyone could give me some sort of clue as to what the problem could be, I would appreciate it greatly.

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Nope, not Kwik Fit! Prefer independent companies, find them to be much cheaper.

He said he did a quick look over it (I was there about a different problem that he fixed), didn't look too in depth, just at "basic" areas and couldn't see anything wrong with the car. His guess was that it could be something behind the dashboard. The problem he fixed was about air in my tyres... one was shaking, so he put in some air and balanced it, works fine now.

I don't think he's too bad of a mechanic. The wheel problem he fixed for free. He said the gear thing was only a guess, and unless it actually affects the performance of the car, I should leave it until I get the MOT and he'll do a thorough check-over of it.

I'll try to pinpoint the location of the hissing noise tomorrow (It's late at night now). I know that it comes from the drivers side, however, if that helps at all?

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Okay, checked it. However, there was a slight problem - I had turned the engine off, then back on again once I'd lifted the bonnet, and the hissing sound had gone. In it's place, there was this whirring noise, sort of like grinding. I've noticed this before, too, how this only happens when you turn the engine on. After driving for a bit, then the hissing noise sounds, even in neutral. The grinding/whirring sound only happens when the car is first turned on, although stays on until I actually start driving.

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Have the MOT tomorrow, going to ask him about it again then, see if he can look into it there and then/another day.

Does the water pump help to supply cold air to the fans? I'm having a problem with my fans too; always blowing hot air, even when they are switched off. Although I suppose that could be many different factors - things blocking the fans, leaks, etc.

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Did you ever get an answer to this problem - my wife's StreetKa has the same noise (seems to come from passenger foot-well) - sounds a bit like a ventilation fan noise but stops when you depress the clutch.